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9b53bc7c65
We use a small cache of size 16 for patterns created from solid colors, e.g. cairo_set_source_rgb(). This helps with toolkits that draw many widgets using the same colour scheme. The cache uses a static index variable, which itself acts like a cache of size 1, remembering the most recently used colour. So repeated lookups for the same colour hit immediately. If that fails, the cache is searched linearly, and if that fails too, a new pattern is created and a random member of the cache is evicted.
73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2005 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Red Hat, Inc.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairoint.h"
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/**
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* cairo_debug_reset_static_data:
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*
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* Resets all static data within cairo to its original state,
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* (ie. identical to the state at the time of program invocation). For
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* example, all caches within cairo will be flushed empty.
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*
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* This function is intended to be useful when using memory-checking
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* tools such as valgrind. When valgrind's memcheck analyzes a
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* cairo-using program without a call to cairo_debug_reset_static_data,
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* it will report all data reachable via cairo's static objects as
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* "still reachable". Calling cairo_debug_reset_static_data just prior
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* to program termination will make it easier to get squeaky clean
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* reports from valgrind.
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*
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* WARNING: It is only safe to call this function when there are no
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* active cairo objects remaining, (ie. the appropriate destroy
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* functions have been called as necessary). If there are active cairo
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* objects, this call is likely to cause a crash, (eg. an assertion
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* failure due to a hash table being destroyed when non-empty).
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**/
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void
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cairo_debug_reset_static_data (void)
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{
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#if CAIRO_HAS_XLIB_SURFACE
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_cairo_xlib_screen_reset_static_data ();
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#endif
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_cairo_font_reset_static_data ();
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#if CAIRO_HAS_FT_FONT
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_cairo_ft_font_reset_static_data ();
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#endif
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_cairo_pattern_reset_static_data ();
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}
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